Performance of a GridPix detector based on the Timepix3 chip

Ligtenberg, Cornelis; Heijhoff, K.; Bilevych, Y.; Desch, K.; Graaf, H. van der; Hartjes, F.; Kamiński, J.; Kluit, P.; Raven, G.; Schiffer, T.; Timmermans, J.

doi:10.1016/j.nima.2018.08.012

Cited by 19 publications

(17 citation statements)

References 11 publications

(16 reference statements)

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“…The quad module was embedded in a TPC detector and operated at the ELSA test beam facility. The single electron resolutions in the transverse and longitudinal planes are similar to the results obtained for the single-chip detector [5] and primarily limited by diffusion. It is shown that a systematic error from the quad detector for the distortions over the pixel plane of 13 µm (9 µm in the central region) has been achieved.…”

Section: Discussionsupporting

confidence: 78%

“…This newer chip offers superior timing, faster readout speed and the possibility to apply time walk corrections. The first results of a single chip detector have been analysed and published in [5]. Electron diffusion in gas was found to be the dominant error on the track position measurement and systematics in the pixel plane remained below 10 µm.…”

Section: Introductionmentioning

confidence: 99%

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Performance of the GridPix detector quad

Ligtenberg¹,

Bilevych²,

Desch³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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A gaseous pixel readout module with four GridPix chips, called the quad, has been developed as a building block for a large time projection chamber readout plane. The quad module has dimensions 39.6 mm × 28.38 mm and an active surface coverage of 68.9%. The GridPix chip consists of a Timepix3 chip with integrated amplification grid and have a high efficiency to detect single ionisation electrons, which enable to make a precise track position measurement. A quad module was installed in a small time projection chamber and measurements of 2.5 GeV electrons were performed at the ELSA accelerator in Bonn, where a silicon telescope was used to provide a reference track. The error on the track position measurement, both in the pixel plane and drift direction, is dominated by diffusion. The quad was designed to have minimum electrical field inhomogeneities and distortions, achieving systematics of better than 13 µm in the pixel plane. The resolution of the setup is 41 µm, where the total systematic error of the quad detector is 24 µm.

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Performance of the GridPix detector quad

Ligtenberg¹,

Bilevych²,

Desch³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…If we assume 220 for n 0 23 the estimated values of F and f are 0.20 ± 0.08 and 0.84 ± 0.06, respectively. It should be noted, however, that the values of F and f quoted above are preliminary since the average number of primary electrons ( n 0 ) is not exactly known for the Penning gas mixture used 24 . Possible increase in the value of n 0 makes F (f ) smaller (larger).…”

Section: Discussionmentioning

confidence: 98%

“…It is essentially a precisely aligned double-mesh layer with an embedded insulating spacer in-between, to be referred to as the gating foil hereafter in the present paper. The gating foil with a frame can be mounted on top of the amplification GEM stack or Micromegas, with either ordinary pad readout or pixel readout [23,24], just like an additional ordinary GEM foil, thereby realizing a wire-less gas amplification device for TPCs with ion-blocking capability 7 .…”

Section: Introductionmentioning

confidence: 99%

“…In the rough estimation of n 0 the weighted average energy transferred to electrons from the Mn K α and K β photons was assumed to be 5.83 keV, and the W -values of 26.4 eV, 34.3 eV and 23.4 eV were used respectively for Ar, CF 4 , and isobutane[51,52], without consideration for their stopping powers 24. In fact, larger values of n 0 have been observed by measurements with pixel readout for argon-isobutane mixtures (see, for example, Refs [53,54]…”

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confidence: 99%

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Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment

Kobayashi

Ogawa

Shoji

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an 55 Fe source and a laser in the absence of a magnetic field. The blocking power of the foil against positive ions was estimated from the electron transmissions.1 The coordinate offset (bias) at short drift distances intrinsic to the barycenter method for the hit point reconstruction in a pad row is assumed to have been properly removed.2 The positive ions are assumed to be iso-C 4 H 10 + . The figures in Ref. [19] suggest that the dominant (final) positive ions are most likely hydrocarbons, at least in the case of binary mixtures of CF 4 and a hydrocarbon.3 The displacement is largest at the maximum drift distance as expected, and at the minimum detector radius because the center of gravity of the beam-induced background, and therefore that of charge density within the ion disk is closer to the inner field cage.

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